Addy Osmani

Software engineer, engineering leader, and author whose writing establishes core principles of agent harness design and quality engineering in the agentic software era. [source: agentic-engineering-trends-2026-synthesis]

Core Contributions

Agent Harness Engineering

Osmani authored foundational writing on agent harness engineering, establishing the distinction between raw model intelligence and the surrounding operating environment, tools, and execution loop. [source: agentic-engineering-trends-2026-synthesis]

Constraint-Driven Agentic Code Quality

In “Agentic Code Quality” (2026), Osmani articulated that as autonomous agents generate code at machine speeds, manual line-by-line human code review ceases to scale. Software quality becomes a direct function of the deterministic constraints, feedback loops, and back-pressure engineered into the agent harness. [source: addy-osmani-agentic-code-quality-2026]

Key tenets:

• Quality as Constraints: Harnesses enforce boundaries via multi-tier checks (linters, type-checkers, property-based tests, mutation testing, and architectural dependency rules).
• Earned Autonomy: Changes route through tiered autonomy based on risk profile, blast radius, and historical verification track records.
• Human Attention Economics: Proactively routing scarce human judgment to architecture, intent, and exceptional failures rather than syntax.

Cross-links

• agentic code quality — constraint-driven verification and multi-tier feedback
• agent harness engineering — operating systems and harnesses for autonomous agents
• agentic software factory — operating model for scaled agent delivery
• simon willison — contemporary in developer tooling and AI workflows
• viv trivedy — harness engineering pioneer